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Post-treatment method of heliotropin waste sulfuric acid

A technology of waste sulfuric acid and piperonal, applied in the directions of sulfur trioxide/sulfuric acid, chemical instruments and methods, sulfur compounds, etc., can solve problems such as failure to reuse sulfuric acid, carbonization, etc., achieve resource saving, easy implementation, and simple process Effect

Pending Publication Date: 2021-01-26
内蒙古科锐化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste sulfuric acid treatment method in the prior art absorbs waste sulfuric acid through resin to remove organic matter, but carbonization will occur during the sulfuric acid concentration process, which cannot meet the standard of sulfuric acid reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] 2000L waste sulfuric acid, COD (80,000), SS (800mg / L), chroma (1000 times).

[0024] Pass through a titanium rod filter, add 2000L-4000L water to the filtered waste sulfuric acid, and dilute to 10-20% sulfuric acid concentration.

[0025] In the micro-interface reactor, it is heated to 50-95 degrees, the air flow rate is 20-2000L / min, and the stirring speed is 100-300 rpm.

[0026] After reacting for 2-18 hours, put it into a 5000L still pot, heat and distill at a temperature of 100-120 degrees, distill 2000-4000L of water, and the sulfuric acid concentration reaches 30-60% content.

[0027] After cooling to room temperature, add 5-50kg of activated carbon for adsorption, and then filter out 1000-1500L of sulfuric acid. Detect COD (1500), SS (40mg / L), chroma (100 times), piperonal 50ppm, glyoxylic acid 50ppm, piperonylcycline 50ppm or less. Meet the requirement of repeated use.

[0028] COD, SS, and chroma in wastewater are reduced by more than 90%, 95%, and 90% resp...

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PUM

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Abstract

The invention discloses a post-treatment method of heliotropin waste sulfuric acid, which comprises the following steps: filtering waste sulfuric acid to remove insoluble substances in the waste sulfuric acid; diluting with water until the concentration is 10-20%, and then removing organic matters in sulfuric acid by using a micro-interface strong oxidation method under air and heating conditions;then adding sulfuric acid to 30-60% by a distillation method; and through activated carbon filtration treatment, the production and use standards are met. Through filtration, dilution, micro-interface strong oxidation, distillation and activated carbon filtration treatment, the method is simple in process and easy to implement, can treat the waste sulfuric acid to reach the production and use standard, can be recycled, saves resources, and has popularization and application values.

Description

technical field [0001] The present invention relates to a kind of chemical industry waste processing technology, relate in particular to a kind of aftertreatment method of piperonal waste sulfuric acid. Background technique [0002] The prior art does not solve the recovery and treatment of piperonal waste sulfuric acid, directly sends the waste sulfuric acid out for processing, or reacts sodium hydroxide into sodium sulfate, resulting in a large amount of hazardous waste. The waste sulfuric acid treatment method of prior art absorbs waste sulfuric acid through resin, removes organic matter, but can produce carbonization in the sulfuric acid concentration process, does not reach the standard of sulfuric acid reuse. Contents of the invention [0003] The purpose of this invention is to provide a kind of aftertreatment method of piperonal waste sulfuric acid. [0004] To achieve the above object, the present invention is implemented according to the following technical solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/90
CPCC01B17/90C01B17/905
Inventor 戚一文王剑徐天成
Owner 内蒙古科锐化工有限公司